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Arrange to call uvm_pageidlezero() from idle loop.

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pk 2000-04-30 21:32:44 +00:00
parent 88fc960805
commit 6832a2d6c9
1 changed files with 38 additions and 9 deletions
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47
sys/arch/sparc/sparc/locore.s
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@ -1,4 +1,4 @@
/* $NetBSD: locore.s,v 1.127 2000/03/21 12:47:02 pk Exp $ */
/* $NetBSD: locore.s,v 1.128 2000/04/30 21:32:44 pk Exp $ */
/*
* Copyright (c) 1996 Paul Kranenburg
@ -4410,7 +4410,7 @@ ENTRY(switchexit)
/*
* Change pcb to idle u. area, i.e., set %sp to top of stack
* and %psr to PSR_S|PSR_ET, and set cpcb to point to idle_u.
* Once we have left the old stack, we can call kmem_free to
* Once we have left the old stack, we can call exit2() to
* destroy it. Call it any sooner and the register windows
* go bye-bye.
*/
@ -4443,7 +4443,7 @@ ENTRY(switchexit)
/*
* Now fall through to `the last switch'. %g6 was set to
* %hi(cpcb), but may have been clobbered in kmem_free,
* %hi(cpcb), but may have been clobbered in exit2(),
* so all the registers described below will be set here.
*
* REGISTER USAGE AT THIS POINT:
@ -4481,7 +4481,41 @@ _ASM_LABEL(idle):
tst %o3
bnz,a Lsw_scan
wr %g1, PIL_CLOCK << 8, %psr ! (void) splclock();
b,a 1b
! Check uvm.page_idle_zero
sethi %hi(_C_LABEL(uvm) + UVM_PAGE_IDLE_ZERO), %o3
ld [%o3 + %lo(_C_LABEL(uvm) + UVM_PAGE_IDLE_ZERO)], %o3
tst %o3
bz 1b
nop
/*
* We must preserve several global registers across the call
* to uvm_pageidlezero(). Use the %ix registers for this, but
* since we might still be running in our our caller's frame
* (if we came here from cpu_switch()), we need to setup a
* frame first.
*/
save %sp, -CCFSZ, %sp
mov %g1, %i0
mov %g2, %i1
mov %g4, %i2
mov %g6, %i3
mov %g7, %i4
! zero some pages
call _C_LABEL(uvm_pageidlezero)
nop
! restore global registers again which are now
! clobbered by uvm_pageidlezero()
mov %i0, %g1
mov %i1, %g2
mov %i2, %g4
mov %i3, %g6
mov %i4, %g7
b 1b
restore
Lsw_panic_rq:
sethi %hi(1f), %o0
@ -4696,11 +4730,6 @@ Lsw_load:
wr %g2, PSR_ET, %psr ! %psr = newpsr ^ PSR_ET;
/* set new cpcb */
st %g5, [%g6 + %lo(cpcb)] ! cpcb = newpcb;
#if 0
/* XXX update masterpaddr too */
sethi %hi(_C_LABEL(masterpaddr)), %g7
st %g5, [%g7 + %lo(_C_LABEL(masterpaddr))]
#endif
ldd [%g5 + PCB_SP], %o6 ! <sp,pc> = newpcb->pcb_<sp,pc>
/* load window */
ldd [%sp + (0*8)], %l0